WO2022097194A1 - Structure management system - Google Patents

Structure management system Download PDF

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Publication number
WO2022097194A1
WO2022097194A1 PCT/JP2020/041170 JP2020041170W WO2022097194A1 WO 2022097194 A1 WO2022097194 A1 WO 2022097194A1 JP 2020041170 W JP2020041170 W JP 2020041170W WO 2022097194 A1 WO2022097194 A1 WO 2022097194A1
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Prior art keywords
electrode
wiring
management system
soil
metal
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PCT/JP2020/041170
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French (fr)
Japanese (ja)
Inventor
真悟 峯田
翔太 大木
守 水沼
宗一 岡
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日本電信電話株式会社
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Application filed by 日本電信電話株式会社 filed Critical 日本電信電話株式会社
Priority to US18/246,995 priority Critical patent/US20230399807A1/en
Priority to PCT/JP2020/041170 priority patent/WO2022097194A1/en
Priority to JP2022560535A priority patent/JPWO2022097194A1/ja
Publication of WO2022097194A1 publication Critical patent/WO2022097194A1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/70—Chemical treatment, e.g. pH adjustment or oxidation

Definitions

  • the present invention relates to a structure management system that manages metal structures buried in the ground.
  • Non-patent document 2, non-patent document 3 Non-patent document 3
  • the normal soil corrosion rate is the period from when the target metal structure is no longer needed until it returns to the soil due to corrosion.
  • the present invention has been made to solve the above problems, and an object thereof is to enable a metal structure buried in the ground to be returned to the soil more quickly.
  • the structure management system is a structure composed of metal and buried in the ground, a first wiring connected to the structure, and a structure composed of metal and buried in the ground. It is equipped with an electrode embedded in, a second wire connected to the electrode, and a switch that turns on and off the conduction state between the first wire and the second wire. With the switch turned on, the electrode is more precious than the structure.
  • the distance between the structure and the electrode is within the range in which the electrons generated when the metal constituting the structure is ionized can reach the electrode.
  • the electrodes are embedded around the metal structure buried in the ground to make the electrodes more noble than the structure, so that the metal structure buried in the ground is used. Things can be returned to the soil more quickly.
  • FIG. 1 is a configuration diagram showing a configuration of a structure management system according to a first embodiment of the present invention.
  • FIG. 2 is a configuration diagram showing a configuration of a structure management system according to a second embodiment of the present invention.
  • This structure management system includes a structure 101, a first wiring 102, an electrode 103, a second wiring 104, and a switch 105.
  • the structure 101 is made of metal such as steel and is buried underground.
  • the structure 101 is, for example, a steel pipe, which is made of, for example, steel or brass, has high strength required for a structure 101 used in a building, and is inexpensive, and is generally oxidized. It will corrode and eventually return to the so-called soil.
  • the first wiring 102 is connected to the structure 101.
  • the first wiring 102 can be a covered conductor.
  • the electrode 103 is made of metal and is buried in the ground where the structure 101 is buried.
  • the second wiring 104 is connected to the electrode 103.
  • the second wiring 104 can be a covered conductor.
  • the switch 105 turns on / off the conduction state between the first wiring 102 and the second wiring 104.
  • the structure 101 and the electrode 103 are buried in the soil 110.
  • the electrode 103 is in a more noble state than the structure 101.
  • the electrode 103 is made of a metal having a lower ionization tendency than the metal constituting the structure 101.
  • the electrode 103 can be made of nickel, copper, tin, silver, gold, platinum, or an alloy containing these. Further, a metal structurally provided with these metals can be used as the metal used for the electrode 103. With this configuration, when the switch 105 is turned on, the electrode 103 becomes more noble than the structure 101. Further, the distance between the structure 101 and the electrode 103 is within a range in which the electrons generated when the metal constituting the structure 101 is ionized can reach the electrode 103.
  • one end of the first wiring 102 is electrically connected to the structure 101 and buried in the soil 110.
  • the other end of the first wiring 102 is in a state of being above the ground 111.
  • one end of the second wiring 104 is electrically connected to the electrode 103 and buried in the soil 110.
  • the other end of the second wiring 104 is in a state of being above the ground 111.
  • the other end of the first wiring 102 protruding from the ground 111 and the other end of the second wiring 104 are connected to the switch 105.
  • the distance between the structure 101 and the electrode 103 is within the reachable range of the electrons generated when the metal constituting the structure 101 is ionized.
  • the switch 105 is turned off while the structure 101 is in use. In this state, the structure 101 deteriorates at a normal soil corrosion rate. After the structure 101 has been used for a predetermined period of time, the switch 105 is turned on at the stage of renewing the structure 101.
  • the structure 101 and the electrode 103 are electrically connected via the first wiring 102 and the second wiring 104, the structure 101 becomes a negative electrode, the electrode 103 becomes a positive electrode, and the structure 101 and the electrode 103
  • the soil 110 between them becomes a state in which a chemical battery that functions as an electrolyte and a separator is formed. Therefore, the structure 101 undergoes corrosion (oxidation) faster than the normal corrosion (oxidation) rate in the soil 110.
  • the switch 105 by turning on the switch 105, even if the structure 101 to be renewed is left buried in the soil 110, it is corroded in a short period of time. Can reduce environmental and safety issues and costs.
  • the shape of the structure 101 is not particularly limited.
  • the shape of the electrode 103 is not particularly limited.
  • the electrode 103 has a shape that can be easily driven into the soil 110 by, for example, having a net shape, a pile shape, or a plate shape, so that the electrode 103 can be easily embedded in the soil 110. Further, by adopting these shapes, the electrode 103 can be easily recovered. Further, a plurality of electrodes 103 can be embedded so as to surround the periphery of the structure 101. This configuration is preferable because the progress of corrosion described above is stabilized.
  • This structure management system includes a structure 101, a first wiring 102, an electrode 103a, a second wiring 104, a switch 105, and a DC power supply 106.
  • the DC power supply 106 With the switch 105 turned on, the side of the electrode 103a is connected to the negative electrode, and the side of the structure 101 is connected to the positive electrode.
  • the switch 105 when the switch 105 is turned on by the DC power supply 106, the structure 101 is polarized to a potential lower than that of the electrode 103a.
  • the output voltage of the DC power supply 106 is adjusted so that a current flows from the structure 101 toward the electrode 103a through the soil 110.
  • the electrode 103a can be made of a metal having the same ionization tendency as the metal constituting the structure 101.
  • the DC power supply 106 can be a chemical battery or a solar cell. Further, the DC power source 106 can use renewable energy such as solar power generation and wind power generation. If the renewable energy is alternating current, it is converted to direct current using a rectifier. In addition, renewable energy can be stored in a storage battery and used. Other configurations are the same as those in the first embodiment described above.
  • one end of the first wiring 102 is electrically connected to the structure 101 and buried in the soil 110.
  • the other end of the first wiring 102 is in a state of being above the ground 111.
  • one end of the second wiring 104 is electrically connected to the electrode 103a and buried in the soil 110.
  • the other end of the second wiring 104 is in a state of being above the ground 111.
  • the other end of the first wiring 102 protruding from the ground 111 and the other end of the second wiring 104 are connected to the switch 105 and the DC power supply 106.
  • the distance between the structure 101 and the electrode 103a is within the reachable range of the electrons generated when the metal constituting the structure 101 is ionized.
  • the switch 105 is turned off while the structure 101 is in use. In this state, the structure 101 deteriorates at a normal soil corrosion rate. After the structure 101 has been used for a predetermined period of time, the switch 105 is turned on at the stage of renewing the structure 101.
  • the structure 101 and the electrode 103a are connected to the DC power supply 106 via the first wiring 102 and the second wiring 104, and a current flows from the structure 101 toward the electrode 103a through the soil 110. Therefore, the structure 101 undergoes corrosion (oxidation) faster than the normal corrosion (oxidation) rate in the soil 110.
  • the structure management system according to the second embodiment can include any of a voltmeter, an ammeter, and a coulomb meter connected to the first wiring 102 or the second wiring 104. With this configuration, it is possible to estimate the corrosion state, speed, end period, etc. of the structure 101 in the corrosion period after the structure 101 is no longer needed.
  • the electrode 103a can be composed of a new structure for refurbishing the structure 101.
  • the new structure is the same as the structure 101.
  • the structure 101 to be renewed and the newly laid structure are connected with the new structure as the electrode 103a as described with reference to FIG. 2, and the switch 105 is turned on.
  • the corrosion rate of the structure 101 to be renewed is increased, and the corrosion period is shortened.
  • the newly laid structure can be protected by the anticorrosion current flowing from the structure 101.
  • an electrode is embedded around a metal structure buried in the ground to make the electrode more noble than the structure, so that the metal buried in the ground is used. Structures can be returned to the soil more quickly.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)

Abstract

A structure (101) is constituted of metal such as steel, and is buried in the ground. A first wiring (102) is connected to the structure (101). A second wiring (104) is connected to an electrode (103). A switch (105) turns on/off a conduction state between the first wiring (102) and the second wiring (104). In a state where the switch (105) has been turned on, the electrode (103) enters a state nobler than that of the structure (101). The electrode (103) can be constituted of a metal that has an ionization tendency lower than that of the metal constituting the structure (101).

Description

構造物管理システムStructure management system
　本発明は、地中に埋設された金属構造物を管理する構造物管理システムに関する。 The present invention relates to a structure management system that manages metal structures buried in the ground.
　我々の生活を支えるインフラ設備は種類も多く、数も膨大である。また、インフラ設備は、市街地だけでなく、山岳地や海岸付近、温泉地や寒冷地、さらに海中や地中に至るまで多様な環境に晒されており、劣化の形態や進行速度も様々である。例えば、鋼管柱、支持アンカ、鋼配管などに代表される金属製の地中設備は、土壌に接するために腐食し、外部環境に応じて異なる速さで劣化が進行する（非特許文献１，非特許文献２，非特許文献３) 。従って、これら金属製の地中設備は構造もしくは機能面での安全性を担保するために、様々な防食方法によって劣化速度を低減しつつ、ある期間使用した後は、一般に、更改する。 There are many types of infrastructure equipment that support our lives, and the number is enormous. In addition, infrastructure equipment is exposed to various environments not only in urban areas but also in mountainous areas and coastal areas, hot spring areas and cold areas, and even in the sea and underground, and the form and speed of deterioration vary. .. For example, metal underground equipment represented by steel pipe columns, support anchors, steel pipes, etc. corrodes due to contact with soil and deteriorates at a different rate depending on the external environment (Non-Patent Documents 1 and 1). Non-patent document 2, non-patent document 3). Therefore, in order to ensure the safety in terms of structure or function, these metal underground equipments are generally renewed after being used for a certain period of time while reducing the deterioration rate by various anticorrosion methods.
　地中埋設された金属構造物を更改する場合、第１に、更改対象の金属構造物を地中から除去し、同じ場所に新しい構造物を埋設する方法がある。また、第２に、更改対象物をそのまま地中に残置したうえで、別の場所に新しい構造物を埋設する方法が考えられる。後者は、更改対象物を地中から取り除くことが、環境もしくは技術面で困難とされる場合に採用されることがあり、作業全体で考えたときに低コストに抑えられる場合も多い。 When renewing a metal structure buried underground, first, there is a method of removing the metal structure to be renewed from the ground and burying a new structure in the same place. Secondly, it is conceivable to leave the object to be renewed in the ground as it is and then bury a new structure in another place. The latter may be adopted when it is environmentally or technically difficult to remove the object to be renewed from the ground, and it is often possible to keep the cost low when considering the entire work.
　更改対象物を地中に埋設したまま新しい構造物を埋設する場合、更改対象物が経時的に腐食劣化し、いわゆる土に還るといわれる状態となることを待つことになる。もちろん、更改対象物が土に還る状態が、地中環境を汚染しないことが大切であるが、懸念点として土に還るまでの期間の長さがある。 When a new structure is buried while the object to be renewed is buried in the ground, it is necessary to wait for the object to be renewed to corrode and deteriorate over time and return to the so-called soil. Of course, it is important that the state in which the object to be renewed returns to the soil does not pollute the underground environment, but the concern is the length of time until it returns to the soil.
　一般的な土中での腐食速度は小さいことが多く、更改対象物が土に還る前に、新しく埋設した構造物の機能的な寿命がきてしまう状況も想像に難くない。この場合、土中に残置される構造物が増えてしまい、新設するエリアが縮小することや、安全上の問題が生じる可能性が高い。従って、地中に埋設されている金属構造物が、不要になってから土に還るまでの期間を短縮する必要があるが、前述の土中腐食速度の小ささから、これを実現することは困難である。 The corrosion rate in general soil is often low, and it is not difficult to imagine the situation where the functional life of the newly buried structure will expire before the renewal target returns to the soil. In this case, there is a high possibility that the number of structures left in the soil will increase, the area to be newly constructed will shrink, and safety problems will occur. Therefore, it is necessary to shorten the period from when the metal structure buried in the ground is no longer needed until it returns to the soil, but due to the low rate of corrosion in the soil mentioned above, this cannot be achieved. Have difficulty.
　前述の通り、更改対象物を地中に埋設したまま新しい構造物を埋設する場合、対象の金属構造物が不要になってから、腐食によって土に還るまでの期間が、通常の土中腐食速度に従う方法では長期化してしまうという課題があった。 As mentioned above, when a new structure is buried while the object to be renewed is buried in the ground, the normal soil corrosion rate is the period from when the target metal structure is no longer needed until it returns to the soil due to corrosion. There was a problem that the method according to the above would take a long time.
　本発明は、以上のような問題点を解消するためになされたものであり、地中埋設された金属構造物を、より迅速に土に還せるようにすることを目的とする。 The present invention has been made to solve the above problems, and an object thereof is to enable a metal structure buried in the ground to be returned to the soil more quickly.
　本発明に係る構造物管理システムは、金属から構成されて地中に埋設された構造物と、構造物に接続された第１配線と、金属から構成されて構造物が埋設されている地中に埋設された電極と、電極に接続された第２配線と、第１配線と第２配線との導通状態をオンオフするスイッチとを備え、スイッチをオンとした状態で、電極は構造物より貴な状態とされ、構造物と電極との距離は、構造物を構成する金属がイオン化したときに生成される電子が、電極に到達可能な範囲とされている。 The structure management system according to the present invention is a structure composed of metal and buried in the ground, a first wiring connected to the structure, and a structure composed of metal and buried in the ground. It is equipped with an electrode embedded in, a second wire connected to the electrode, and a switch that turns on and off the conduction state between the first wire and the second wire. With the switch turned on, the electrode is more precious than the structure. The distance between the structure and the electrode is within the range in which the electrons generated when the metal constituting the structure is ionized can reach the electrode.
　以上説明したように、本発明によれば、地中に埋設された金属製の構造物の周囲に電極を埋設し、電極を構造物より貴な状態とするので、地中埋設された金属構造物が、より迅速に土に還せるようになる。 As described above, according to the present invention, the electrodes are embedded around the metal structure buried in the ground to make the electrodes more noble than the structure, so that the metal structure buried in the ground is used. Things can be returned to the soil more quickly.
図１は、本発明の実施の形態１に係る構造物管理システムの構成を示す構成図である。FIG. 1 is a configuration diagram showing a configuration of a structure management system according to a first embodiment of the present invention. 図２は、本発明の実施の形態２に係る構造物管理システムの構成を示す構成図である。FIG. 2 is a configuration diagram showing a configuration of a structure management system according to a second embodiment of the present invention.
　以下、本発明の実施の形態に係る構造物管理システムについて説明する。 Hereinafter, the structure management system according to the embodiment of the present invention will be described.
［実施の形態１］
　はじめに、本発明の実施の形態１に係る構造物管理システムについて図１を参照して説明する。この構造物管理システムは、構造物１０１、第１配線１０２、電極１０３、第２配線１０４、スイッチ１０５を備える。 [Embodiment 1]
First, the structure management system according to the first embodiment of the present invention will be described with reference to FIG. This structure management system includes a structure 101, a first wiring 102, an electrode 103, a second wiring 104, and a switch 105.
　構造物１０１は、鋼材などの金属から構成されて地中に埋設されている。構造物１０１は、例えば鋼管であり、例えば鉄鋼や真鍮から構成され、建造物などに用いられる構造物１０１として要求される高い強度を備え、また、コストのかからないものであり、一般には、酸化により腐食し、いずれは、いわゆる土に還るといわれる状態となる。 The structure 101 is made of metal such as steel and is buried underground. The structure 101 is, for example, a steel pipe, which is made of, for example, steel or brass, has high strength required for a structure 101 used in a building, and is inexpensive, and is generally oxidized. It will corrode and eventually return to the so-called soil.
　第１配線１０２は、構造物１０１に接続されている。第１配線１０２は、被覆導線とすることができる。電極１０３は、金属から構成されて構造物１０１が埋設されている地中に埋設されている。第２配線１０４は、電極１０３に接続されている。第２配線１０４は、被覆導線とすることができる。スイッチ１０５は、第１配線１０２と第２配線１０４との導通状態をオンオフする。この例において、構造物１０１、電極１０３は、土壌１１０の中に埋設されている。 The first wiring 102 is connected to the structure 101. The first wiring 102 can be a covered conductor. The electrode 103 is made of metal and is buried in the ground where the structure 101 is buried. The second wiring 104 is connected to the electrode 103. The second wiring 104 can be a covered conductor. The switch 105 turns on / off the conduction state between the first wiring 102 and the second wiring 104. In this example, the structure 101 and the electrode 103 are buried in the soil 110.
　また、スイッチ１０５をオンとした状態で、電極１０３は、構造物１０１より貴な状態となる。実施の形態１では、電極１０３は、構造物１０１を構成する金属よりイオン化傾向が小さい金属から構成する。例えば、構造物１０１が鋼材から構成されている場合、電極１０３は、ニッケルや銅、錫、銀、金、白金、もしくはこれらを含む合金から構成することができる。またこれら金属を構造的に備えたものを、電極１０３に用いる金属とすることができる。この構成とすることで、スイッチ１０５をオンとすると、電極１０３は構造物１０１より貴な状態となる。また、構造物１０１と電極１０３との距離は、構造物１０１を構成する金属がイオン化したときに生成される電子が、電極１０３に到達可能な範囲とされている。 Further, with the switch 105 turned on, the electrode 103 is in a more noble state than the structure 101. In the first embodiment, the electrode 103 is made of a metal having a lower ionization tendency than the metal constituting the structure 101. For example, when the structure 101 is made of steel, the electrode 103 can be made of nickel, copper, tin, silver, gold, platinum, or an alloy containing these. Further, a metal structurally provided with these metals can be used as the metal used for the electrode 103. With this configuration, when the switch 105 is turned on, the electrode 103 becomes more noble than the structure 101. Further, the distance between the structure 101 and the electrode 103 is within a range in which the electrons generated when the metal constituting the structure 101 is ionized can reach the electrode 103.
　次に、実施の形態１に係る構造物管理システムを用いた、構造物の管理方法について説明する。まず、構造物１０１に第１配線１０２の一端を電気的に接続して土壌１１０に埋設する。第１配線１０２の他端は、地面１１１より上に出した状態とする。また、電極１０３に第２配線１０４の一端を電気的に接続して土壌１１０に埋設する。第２配線１０４の他端は、地面１１１より上に出した状態とする。地面１１１より出されている第１配線１０２の他端と、第２配線１０４の他端とを、スイッチ１０５に接続する。土壌１１０の中において、構造物１０１と電極１０３との間隔は、構造物１０１を構成する金属がイオン化したときに生成される電子が到達可能な範囲とする。 Next, a structure management method using the structure management system according to the first embodiment will be described. First, one end of the first wiring 102 is electrically connected to the structure 101 and buried in the soil 110. The other end of the first wiring 102 is in a state of being above the ground 111. Further, one end of the second wiring 104 is electrically connected to the electrode 103 and buried in the soil 110. The other end of the second wiring 104 is in a state of being above the ground 111. The other end of the first wiring 102 protruding from the ground 111 and the other end of the second wiring 104 are connected to the switch 105. In the soil 110, the distance between the structure 101 and the electrode 103 is within the reachable range of the electrons generated when the metal constituting the structure 101 is ionized.
　構造物１０１が使用されている期間は、スイッチ１０５をオフ状態とする。この状態では、構造物１０１は、通常の土壌腐食速度で劣化する。構造物１０１を所定の期間使用した後、構造物１０１を更改する段階において、スイッチ１０５をオン状態とする。 The switch 105 is turned off while the structure 101 is in use. In this state, the structure 101 deteriorates at a normal soil corrosion rate. After the structure 101 has been used for a predetermined period of time, the switch 105 is turned on at the stage of renewing the structure 101.
　この状態では、第１配線１０２および第２配線１０４を介し、構造物１０１と電極１０３とが電気的に接続し、構造物１０１が負極となり、電極１０３が正極となり、構造物１０１と電極１０３との間の土壌１１０が、電解質およびセパレータとして機能する化学電池が構成される状態となる。このため、構造物１０１は、土壌１１０中の通常の腐食（酸化）速度よりも早く腐食（酸化）が進行する。 In this state, the structure 101 and the electrode 103 are electrically connected via the first wiring 102 and the second wiring 104, the structure 101 becomes a negative electrode, the electrode 103 becomes a positive electrode, and the structure 101 and the electrode 103 The soil 110 between them becomes a state in which a chemical battery that functions as an electrolyte and a separator is formed. Therefore, the structure 101 undergoes corrosion (oxidation) faster than the normal corrosion (oxidation) rate in the soil 110.
　上述したように、実施の形態１によれば、スイッチ１０５をオン状態とすることで、更改対象の構造物１０１を土壌１１０の中に埋めたままにしておいても、短期間で腐食させることができ、環境や安全上の問題およびコストが低減できる。 As described above, according to the first embodiment, by turning on the switch 105, even if the structure 101 to be renewed is left buried in the soil 110, it is corroded in a short period of time. Can reduce environmental and safety issues and costs.
　なお、構造物１０１の形状には、特に制限はない。同様に、電極１０３の形状に特に制限はない。また、電極１０３は、例えば、網状や杭状または板状とすることで、土壌１１０に打ち込みやすい形状とすることで、土壌１１０に埋設しやすいものとなる。また、これら形状とすることで、電極１０３を、容易に回収できるようになる。また、電極１０３は、複数個を構造物１０１の周辺を囲うように埋め込むことができる。この構成とすることで、上述した腐食の進行が安定化するため好ましい。 The shape of the structure 101 is not particularly limited. Similarly, the shape of the electrode 103 is not particularly limited. Further, the electrode 103 has a shape that can be easily driven into the soil 110 by, for example, having a net shape, a pile shape, or a plate shape, so that the electrode 103 can be easily embedded in the soil 110. Further, by adopting these shapes, the electrode 103 can be easily recovered. Further, a plurality of electrodes 103 can be embedded so as to surround the periphery of the structure 101. This configuration is preferable because the progress of corrosion described above is stabilized.
［実施の形態２］
　次に、本発明の実施の形態２に係る構造物管理システムについて図２を参照して説明する。この構造物管理システムは、構造物１０１、第１配線１０２、電極１０３ａ、第２配線１０４、スイッチ１０５、および直流電源１０６を備える。直流電源１０６は、スイッチ１０５をオンとした状態で、電極１０３ａの側が負極に接続し、構造物１０１の側が正極に接続する。 [Embodiment 2]
Next, the structure management system according to the second embodiment of the present invention will be described with reference to FIG. This structure management system includes a structure 101, a first wiring 102, an electrode 103a, a second wiring 104, a switch 105, and a DC power supply 106. In the DC power supply 106, with the switch 105 turned on, the side of the electrode 103a is connected to the negative electrode, and the side of the structure 101 is connected to the positive electrode.
　実施の形態２において、直流電源１０６により、スイッチ１０５をオンとすると、構造物１０１は、電極１０３ａより卑な電位に分極される。スイッチ１０５をオン状態としたときに、構造物１０１から電極１０３ａに向けて土壌１１０を介して電流が流れるように、直流電源１０６の出力電圧が調整される。また、実施の形態２において、電極１０３ａは、構造物１０１を構成する金属と同じイオン化傾向の金属から構成することができる。 In the second embodiment, when the switch 105 is turned on by the DC power supply 106, the structure 101 is polarized to a potential lower than that of the electrode 103a. When the switch 105 is turned on, the output voltage of the DC power supply 106 is adjusted so that a current flows from the structure 101 toward the electrode 103a through the soil 110. Further, in the second embodiment, the electrode 103a can be made of a metal having the same ionization tendency as the metal constituting the structure 101.
　直流電源１０６は、化学電池や太陽電池とすることができる。また、直流電源１０６は、例えば、太陽光発電や風力発電などの再生可能エネルギーが利用できる。また、再生可能エネルギーが交流の場合、整流器を用いて直流とする。また、再生可能エネルギーを蓄電池に蓄電して利用することができる。他の構成は、前述した実施の形態１と同様である。 The DC power supply 106 can be a chemical battery or a solar cell. Further, the DC power source 106 can use renewable energy such as solar power generation and wind power generation. If the renewable energy is alternating current, it is converted to direct current using a rectifier. In addition, renewable energy can be stored in a storage battery and used. Other configurations are the same as those in the first embodiment described above.
　実施の形態２においても、まず、構造物１０１に第１配線１０２の一端を電気的に接続して土壌１１０に埋設する。第１配線１０２の他端は、地面１１１より上に出した状態とする。また、電極１０３ａに第２配線１０４の一端を電気的に接続して土壌１１０に埋設する。第２配線１０４の他端は、地面１１１より上に出した状態とする。地面１１１より出されている第１配線１０２の他端と、第２配線１０４の他端とを、スイッチ１０５および直流電源１０６に接続する。土壌１１０の中において、構造物１０１と電極１０３ａとの間隔は、構造物１０１を構成する金属がイオン化したときに生成される電子が到達可能な範囲とする。 Also in the second embodiment, first, one end of the first wiring 102 is electrically connected to the structure 101 and buried in the soil 110. The other end of the first wiring 102 is in a state of being above the ground 111. Further, one end of the second wiring 104 is electrically connected to the electrode 103a and buried in the soil 110. The other end of the second wiring 104 is in a state of being above the ground 111. The other end of the first wiring 102 protruding from the ground 111 and the other end of the second wiring 104 are connected to the switch 105 and the DC power supply 106. In the soil 110, the distance between the structure 101 and the electrode 103a is within the reachable range of the electrons generated when the metal constituting the structure 101 is ionized.
　構造物１０１が使用されている期間は、スイッチ１０５をオフ状態とする。この状態では、構造物１０１は、通常の土壌腐食速度で劣化する。構造物１０１を所定の期間使用した後、構造物１０１を更改する段階において、スイッチ１０５をオン状態とする。 The switch 105 is turned off while the structure 101 is in use. In this state, the structure 101 deteriorates at a normal soil corrosion rate. After the structure 101 has been used for a predetermined period of time, the switch 105 is turned on at the stage of renewing the structure 101.
　この状態では、第１配線１０２および第２配線１０４を介し、構造物１０１および電極１０３ａが、直流電源１０６に接続し、構造物１０１から電極１０３ａに向けて土壌１１０を介して電流が流れる。このため、構造物１０１は、土壌１１０中の通常の腐食（酸化）速度よりも早く腐食（酸化）が進行する。 In this state, the structure 101 and the electrode 103a are connected to the DC power supply 106 via the first wiring 102 and the second wiring 104, and a current flows from the structure 101 toward the electrode 103a through the soil 110. Therefore, the structure 101 undergoes corrosion (oxidation) faster than the normal corrosion (oxidation) rate in the soil 110.
　上述したように、実施の形態２においても、スイッチ１０５をオン状態とすることで、更改対象の構造物１０１を土壌１１０の中に埋めたままにしておいても、短期間で腐食させることができ、環境や安全上の問題およびコストが低減できる。 As described above, also in the second embodiment, by turning on the switch 105, even if the structure 101 to be renewed is left buried in the soil 110, it can be corroded in a short period of time. It can reduce environmental and safety issues and costs.
　また、実施の形態２に係る構造物管理システムは、第１配線１０２または第２配線１０４に接続された、電圧計、電流計、およびクーロンメータのいずれかを備えることができる。この構成とすることで、構造物１０１が不要になってからの腐食期間において、構造物１０１の腐食状態や速度、終了期間などを見積もることができる。 Further, the structure management system according to the second embodiment can include any of a voltmeter, an ammeter, and a coulomb meter connected to the first wiring 102 or the second wiring 104. With this configuration, it is possible to estimate the corrosion state, speed, end period, etc. of the structure 101 in the corrosion period after the structure 101 is no longer needed.
　また、実施の形態２において、電極１０３ａは、構造物１０１の更改するための新たな構造物から構成することができる。新たな構造物は、構造物１０１と同じものである。この構成とすることで、構造物１０１を一定期間使用し、更改する時期になったとき、構造物１０１とは別の場所の土壌１１０の中に、新しい構造物を埋設する。次いで、更改対象の構造物１０１と新しく敷設した構造物とを、新しい構造物を電極１０３ａとした状態で、図２を用いて説明したように接続し、スイッチ１０５をオン状態とする。 Further, in the second embodiment, the electrode 103a can be composed of a new structure for refurbishing the structure 101. The new structure is the same as the structure 101. With this configuration, when the structure 101 is used for a certain period of time and it is time to renew it, a new structure is buried in the soil 110 at a place different from the structure 101. Next, the structure 101 to be renewed and the newly laid structure are connected with the new structure as the electrode 103a as described with reference to FIG. 2, and the switch 105 is turned on.
　この結果、更改対象の構造物１０１の腐食速度が増し、腐食期間が短縮される。
また、同時に、新しく敷設した構造物は、構造物１０１から流れる防食電流によって防食することが可能となる。 As a result, the corrosion rate of the structure 101 to be renewed is increased, and the corrosion period is shortened.
At the same time, the newly laid structure can be protected by the anticorrosion current flowing from the structure 101.
　以上に説明したように、本発明によれば、地中に埋設された金属製の構造物の周囲に電極を埋設し、電極を構造物より貴な状態とするので、地中埋設された金属構造物が、より迅速に土に還せるようになる。 As described above, according to the present invention, an electrode is embedded around a metal structure buried in the ground to make the electrode more noble than the structure, so that the metal buried in the ground is used. Structures can be returned to the soil more quickly.
　なお、本発明は以上に説明した実施の形態に限定されるものではなく、本発明の技術的思想内で、当分野において通常の知識を有する者により、多くの変形および組み合わせが実施可能であることは明白である。 It should be noted that the present invention is not limited to the embodiments described above, and many modifications and combinations can be carried out by a person having ordinary knowledge in the art within the technical idea of the present invention. That is clear.
　１０１…構造物、１０２…第１配線、１０３…電極、１０４…第２配線、１０５…スイッチ、１１０…土壌、１１１…地面。 101 ... structure, 102 ... first wiring, 103 ... electrode, 104 ... second wiring, 105 ... switch, 110 ... soil, 111 ... ground.

Claims (4)

  1. 　金属から構成されて地中に埋設された構造物と、
    　前記構造物に接続された第１配線と、
    　金属から構成されて前記構造物が埋設されている地中に埋設された電極と、
    　前記電極に接続された第２配線と、
    　前記第１配線と前記第２配線との導通状態をオンオフするスイッチと
    　を備え、
    　前記スイッチをオンとした状態で、前記電極は前記構造物より貴な状態とされ、
    　前記構造物と前記電極との距離は、前記構造物を構成する金属がイオン化したときに生成される電子が、前記電極に到達可能な範囲とされている
    　ことを特徴とする構造物管理システム。     Structures made of metal and buried in the ground,
    The first wiring connected to the structure and
    Electrodes buried in the ground composed of metal and in which the structure is buried,
    The second wiring connected to the electrode and
    A switch for turning on / off the conduction state between the first wiring and the second wiring is provided.
    With the switch turned on, the electrodes are in a more noble state than the structure.
    A structure management system characterized in that the distance between the structure and the electrode is within a range in which electrons generated when the metal constituting the structure is ionized can reach the electrode.
  2. 　請求項１記載の構造物管理システムにおいて、
    　前記電極は、前記構造物を構成する金属よりイオン化傾向が小さい金属から構成されていることを特徴とする構造物管理システム。     In the structure management system according to claim 1,
    A structure management system characterized in that the electrode is made of a metal having a lower ionization tendency than the metal constituting the structure.
  3. 　請求項１記載の構造物管理システムにおいて、
    　前記スイッチをオンとした状態で、前記電極の側が負極に接続し、前記構造物の側が正極に接続する直流電源をさらに備え、
    　前記スイッチをオンとすると、前記構造物から前記電極に向けた電流が土壌を介して流れることを特徴とする構造物管理システム。     In the structure management system according to claim 1,
    With the switch turned on, a DC power supply is further provided in which the side of the electrode is connected to the negative electrode and the side of the structure is connected to the positive electrode.
    A structure management system characterized in that when the switch is turned on, an electric current directed from the structure to the electrodes flows through the soil.
  4. 　請求項１～３のいずれか１項に記載の構造物管理システムにおいて、
    　前記第１配線または前記第２配線に接続された、電圧計、電流計、およびクーロンメータのいずれかを備えることを特徴とする構造物管理システム。     In the structure management system according to any one of claims 1 to 3,
    A structure management system comprising any of a voltmeter, an ammeter, and a coulomb meter connected to the first wiring or the second wiring.
PCT/JP2020/041170 2020-11-04 2020-11-04 Structure management system WO2022097194A1 (en)

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Publication number Priority date Publication date Assignee Title
JP3198598B2 (en) * 1992-04-07 2001-08-13 株式会社大林組 How to pull out steel members buried underground
JP2001182863A (en) * 1999-12-24 2001-07-06 Tokyo Gas Co Ltd Disposal method of buried pipe
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JP2005180001A (en) * 2003-12-18 2005-07-07 Tobishima Corp Prestressing stranded wire removing method and device for removing the same
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